Key-removing device.



R. F. WHALLEY.

KEY REMOVING DEVICE.

APPLICATION FILED JULY 5, I918.

1,294,582. Patented Feb. 18, 1919.

8 'FGUF-KE. T

I s W W NT R FFGLJRFL. 4- ZZA/ is ATT RH Y UNITED STATES PATENT OFFICE.

BOY F. WHALLEY, OF SAN JOSE, CALIFORNIA.

KEY-REMOVING DEVICE.

Specification of Letters Patent.

Application filed July 5, 1918. Serial No. 243,413.

sitions in the key-ways of shafts and the wheels or pulleys mountedthereon and held against rotation on said shafts by said keys.

In one of the customary methods of removing keys, a wedge is used thatbears against one corner of the key head and against the side of thewheel held by the key. This method causes mutilation of the key headbecause of the angular bearing of the wedge orkey-drift against thesame, and is unsatisfactory because the said key-drift binds against themore or less roughened side of the wheel. Also in using a method of thiskind, if the key projects beyond the end of the shaft it is easily bentbecause no support is provided for the back thereof, and in either casethe key-drift has to be held in position by hand while driving.

It is, therefore, one object of my invention to provide a device of thecharacter indicated which causes the key-drift to assume a squarebearing against the key head,'thereby preventing the mutilation of saidhead,

and to provide a smooth surface for the said key-drift to operateagainst, thereby preventing marring of the key-drift in driving and alsofacilitating its removal.

Another object of my invention is to provide a device of the characterindicated that will pull the key without binding the same inthe'key-way. Still another object is to provide a device of thecharacter indicated in which the key-drift is automatically and properlypositioned and held. Still another object is to provide a device of sucha nature that the key-drift will be so held as to contact with the keyhead only, thereby preventing the roughening or inju'ring of the keyproper.

Other objects are to provide a device for the purpose stated that willembody the above mentioned characteristics and that will be strong,simple and easily positioned,

utilized and removed.

Other objects and. advantages will appear in the following descriptionand accompanying drawing which are intended to cover one embodiment ofmy invention only. I do not, therefore, wish to confine my invention tothe specific form and construction and combination shown and described,but to include all changes that may be made within the scope of theappended claims.

In the drawings Figure 1 is a perspective illustration of the Iplevicewithout the key-drift used therewit Fig. 2 is a plan view of the devicein position to start a closely driven key.

Fig. 3 is a plan view of the device in position to move a key partlyremoved by the device when used as shown in Fig. 2.

Fig. 4 is a side elevation of the device when used to remove a keyextending beyond the end of a shaft.

Fig. 5 is an end-view of the device show ing the chamfered corners ofthe end used in Fig. 4. I

Fig. 6 is a plan view of the device having key-drift slots rectangularin form.

Fig. 7 is a perspective illustration of a key-drift having a bead formedthereon, part broken away.

Similar characters of reference indicate similar parts throughout theseveral views.

Referring now more particularly to the drawing, 1 indicates a shafthaving a keyway 2, a pulley 3 mounted thereon and locked in position bykey 4, the numeral 5 indicating the head of said key 4. The body of thedevice embodying my invention comprises a pair of parallelly spaced sidemembers 6 and 7 joined near one end by a bridge 8 preferably formedintegrally therewith and set a distance above the upper edges thereof asindicated at 9. The short end is indicated by the bracket 10 and thelonger end by the bracket 11. In sides 6 and 7 and in approximately thepositions shown are formed slots 12 and 18 respectively, each slothaving beveled ends as indicated at 14 and 15, and 16 and 17respectively for the purpose hereinafter set forth. The keydrift isindicated by numeral 18 and may be a metallic wedge of the thickness.slightlyless than the width of slots 12 and 13. In the embodiment'shownin Figs. 2 and 3 the key-drift 18 has tapering sides 19 and 20. Asillustrated in these figures when the wheel 3 is a distance from the endof shaft 1 the device'is 'first'placedupon shaft'l and bridging key 4with end 10 abutting wheel 3. The key-drift 18 is now inserted throughslots 12 and 13, side 20 engaging beveled r may be continued until thekey removed.

If the key projects over the end of the shaft 1 as shown in Fig. i, thenthe device is positioned upon key 4 substantially as shown, and theinner edges of the ends 10 are chamfered as shown at 21 so that theupper surf: ?s of slots 12 and 13 may be positioned igrhtly lower thanthe outer surface of key 4- as shown in Fig. l. The key-drift may now bedriven in through slots 12 and 13 and the key removed as abovedescribed.

It will now be seen that by using this device the same keymay be removedmany times while being fitted without injury to any part thereof. Thesloping ends 1415 and 1617 of slots 12 and 13 cause the keydrift tooperate squarely upon head 5 of key 4. When the device is placed inposition and the key-drift inserted ready for driving they lock with thekey and shaft or with the key and shaft and pulley so that they do nothave to be held during the driving operation. The thickness 22 isslightly greater than the exposed thickness of key 4 therefore keydrift18 engages the bottoms of slots 12 and 13 and does not contact with thesurface of key 4. The ends 14-15 and 1617 of slots 12 and 13 alwaysprovide smooth surfaces for key-drift 18 to operate against. When thekey projects beyond the end of shaft 1 as shown in Fig. 3 then thebridge 8 forms a support that prevents bending of the key.

It is understood of course, that slots 12 and 13 may have ends formedperpendicularly to theirlonger edges as shown in Fig. 6, or not, aspractical application may require. Also since keys are rovided with achannel as 23 in head a liead 24 may be provided upon the edge ofkey-drift 18 adapted to engage the said channel 23 thereby securing asolid bearing of said keydrift against the full thickness oft-he head 5.The key-drift holder may have a slotas 25 formed therein to engage bead24 on key-drift 18 if the position of the said keydrift is reversedforany reason.

.1. key remvoing device adapted to be used 1n conjunction with a shaft,wheel and key in operative position with relation to each other, andcomprising a pair of fixedly spaced side members adapted to straddlesaidkey and engage said shaft and wheel and having slots formed therein toreceive a key-drift. and a key-drift adapted to engage said slots andsaid key.

A key removing device adapted to be used in conjunction with a shaft,wheel and key in operative position with relation to each other. andcomprising a pair of fixedly spaced side members adapted to straddlesaid key and engage said shaft and wheel and having slots formed thereinto receive a key-drift, and a key-drift adapted to engage said slots andsaid key, said slots having beveled ends, and each end of one slot beingin substantial alinement with the corresponding end of the other slot.

3. A key removing device adapted to be used in conjunction with a shaft,wheel and key in o 'xu'ative position with relation to a each other, andcomprising a pair of fixedly spaced side members adapted to straddlesaid key and engage said shaft and wheel and having slots formed thereinto receive a key-drift, and a key-drift having a bead formed on the edgethereof adapted to engage said slots and said key.

4. A key removing device adapted to be used in conjunction with a shaft,Wheel and key in operative position with relation to each other, andcomprising a pair of side members and a spacing bridge raised a distanceabove the connected portions of said side members, said side membersbeing adapted to straddle said key and engage said shaft and wheel andhaving slots formed therein to receive a key-drift, and a key-driftadapted to engage said slots and said key.

than the other, and said side members being adapted to straddle said keyand engage said shaft and wheel and having slots formed therein toreceive a key-drift, and a key-drift adapted to engage said. slots andsaid key.

6. A key removing device adapted to be used in conjunction with a shaft,wheel and key in operative position with relation to each other. andcomprising a pair of side members and a spacing bridge, said spacingbridge being shorter than said side members and raised a distance abovethe connected portions thereof and positioned closer to one end thereofthan the other, and said side members being adapted to straddle said keyand engage said shaft and wheel and having slots formed therein toreceive a keydrift, and a key-drift adapted to engage said slots andsaid key.

7. A key removing device adapted to be used in conjunction with a shaft,wheel and key in operative position with relation to each other, andcomprising a pair of fixedly spaced side members adapted to straddlesaid key and engage said shaft and wheel and having slots formed thereinto receive a keydrift, and a key-drift adapted to engage said slots andthe head of said key, the distance between the shaft engaging inner edgeof each member and the adjacent inner edge of the slot in said memberbeing greater than the exposed thickness of said key where inserted insaid shaft.

8. In a key removing device, a holder for the key-drift comprising apair of side members and a spacing bridge connecting the correspondingedges thereof, {said bridge being shorter than said side members, andsaid side members having apertures formed therein adjacent said bridgeand substantially in alinement with each other, said side members havingthe inner portion of their edges chamfered from said bridge to one endthereof.

9. A key removing device adapted to be used in conjunction with a shaft,wheel and key in operative position with relation to each other, andcomprising a pair of side members and a spacing bridge raised a distanceabove the connected portions of said side members, said side membersbeing adapted to straddle said key and engage said shaft and wheel andhaving slots formed therein to receive a key-drift, and a key-driftadapted to engage said slots and the head of said key, the distancebetween the inner surface of said bridge and the adjacent inner edges ofsaid slots, and between the shaft-engaging inner edges of said membersand the adjacent inner edges of said slots, being greater than theexposed thickness of the body portion of said key.

In testimony whereof I have hereunto affixed my signature this 27th dayof June,

ROY F. WHALLEY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner 01' Patents, Washington, D. G.

